Improvement in pitman-rod connections for steam-engines



. R. SCHRADER. PITMAN-ROD CONNECTIONS FOR STEAM-ENGINES.

No.193,730. Pat

UNITED STATES OFFICE.

RUDOLPH SGHRADER, OF INDIANAPOLIS, INDIANA.

IMPROVEMENT IN PlTMAN-ROD CONNECTIONS FOR STEAM-ENGINES.

Specification forming part of Letters Patent No. 193,730, dated July 31,1877; application filed July 7, 1877.

To all whom it may concern:

Be it known that I, RUDOLPH SGHRADER, of Indianapolis, in the county ofMarion and State of Indiana, have invented a new and valuableImprovement in Pitman-Bods; and I do hereby declare that the followingis a full, clear, and exact description of the construction andoperation of the same, reference being had to the annexed drawings,making a part of this specification, and to the letters and figures ofreference marked thereon.

Figure 1 of the drawings is a representation of a horizontal sectionalview of the joint of my pitman-rod. Fig. 2 is a transverse verticalsectional view; and Fig. 3 is a perspective detail, of the same.

The nature of my invention consists in the construction and arrangementof a pitmanconnection for steam-engines, as will be hereinafter morefully set forth.

The annexed drawing, to which reference is made, fully illustrates myinvention.

A represents the end of the pitman formed with a cam-hook, B, and O isthe rest for said camhook. These parts are used on all engines which aremade with rock-shafts; but heretofore the cam-hook was made with acommon round rest, so that only the two outside corners would work, andthis often brought on lock-motion, which could not be stopped. In myinvention 1 use the same hook; but it is made slightly tapering, in sucha manner that the mouth of the hook is wider than the inner or upper endthereof. On the rest 0 is placed a box, made in two equal parts, D D,constructed as shown-that is to say, when put together, the top of thebox is half-round and the sides made tapering or inclined to fit thetaper of the cam-hook B. On the ends of the two parts of the box D D areformed circular tenons a, a, which enter and fit into correspondinggrooves b b, made in the inner faces of the heads or disks G G, whichare secured to the rest C, and between which the cam-hook B is placed onsaid box.

With this invention the objection to the ordinary cam-hook and restisentirely obviated,

because the rest works all over even, and the box can easily be made tofit the hook properly by means of the taper, as described.'

The bisected box D may be made of brass or any other suitable metal.

What I claim as new, and desire to secure by Letters Patent, is

1. The combination of the cam-hook B, made tapering, as described, therest 0, and the longitudinal bisected box D D, having its sides madetapering, substantially as and for the. purposes herein set forth.

2. The longitudinal bisected box D D, havin g tapering sides, and theends provided with circular tenons a a, in combination with the rest 0,heads G G, with grooves b b, and the cam-hook B, substantially as andfor the purposes herein set forth.

In testimony that I claim the above I have hereunto subscribed my namein the presence of two witnesses.

RUDOLPH SGHRADER.

Witnesses OYRUs T. NIXON, UYBUS LAUGHLIN.

